SN74CB3Q3244 Status: ACTIVE

8-Bit FET Bus Switch 2.5-V/3.3-V Low-Voltage High-Bandwidth Bus Switch

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Datasheet

SN74CB3Q3244 (Rev. B) (PDF 1058 KB)
02 Dec 2004

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Product Information

Features

High-Bandwidth Data Path (Up To 500 MHz)
5-V-Tolerant I/Os with Device Powered-Up or Powered-Down
Low and Flat ON-State Resistance (r_on) Characteristics Over Operating Range (r_on = 4 Typical)
Rail-to-Rail Switching on Data I/O Ports
- 0- to 5-V Switching With 3.3-V V_CC
- 0- to 3.3-V Switching With 2.5-V V_CC
Bidirectional Data Flow, With Near-Zero Propagation Delay
Low Input/Output Capacitance Minimizes Loading and Signal Distortion (C_io(OFF) = 3.5 pF Typical)
Fast Switching Frequency (f_OE = 20 MHz Max)
Data and Control Inputs Provide Undershoot Clamp Diodes
Low Power Consumption (I_CC = 0.7 mA Typical)
V_CC Operating Range From 2.3 V to 3.6 V
Data I/Os Support 0 to 5-V Signaling Levels (0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V)
Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs
I_off Supports Partial-Power-Down Mode Operation
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Performance Tested Per JESD 22
- 2000-V Human-Body Model (A114-B, Class II)
- 1000-V Charged-Device Model (C101)
Supports Both Digital and Analog Applications: Differential Signal Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating

For additional information regarding the performance characteristics of the CB3Q family, refer to the TI application report, CBT-C, CB3T, and CB3Q Signal-Switch Families, literature number SCDA008.

Description

The SN74CB3Q3244 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of the pass transistor, providing a low and flat ON-state resistance (r_on). The low and flat ON-state resistance allows for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus. Specifically designed to support high-bandwidth applications, the SN74CB3Q3244 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

The SN74CB3Q3244 is organized as two 4-bit bus switches with separate output-enable (1OE\, 2OE\) inputs. It can be used as two 4-bit bus switches or as one 8-bit bus switch. When OE\ is low, the associated 4-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE\ is high, the associated 4-bit bus switch is OFF, and the high-impedance state exists between the A and B ports.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry prevents damaging current backflow through the device when it is powered down. The device has isolation during power off.

To ensure the high-impedance state during power up or power down, OE\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools	Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Footprints	Samples
74CB3Q3244DBQRE4	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 20	View	2500 \| LARGE T&R
74CB3Q3244DBQRG4	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 20	View	2500 \| LARGE T&R
74CB3Q3244DGVRE4	ACTIVE	-40 to 85	0.62 \| 1ku	TVSOP (DGV) \| 20		2000 \| LARGE T&R
74CB3Q3244DGVRG4	ACTIVE	-40 to 85	0.62 \| 1ku	TVSOP (DGV) \| 20		2000 \| LARGE T&R
74CB3Q3244RGYRG4	ACTIVE	-40 to 85	0.84 \| 1ku	QFN (RGY) \| 20		1000 \| LARGE T&R
SN74CB3Q3244DBQR	ACTIVE	-40 to 85	0.62 \| 1ku	SSOP/QSOP (DBQ) \| 20	View	2500 \| LARGE T&R
SN74CB3Q3244DBR	PREVIEW	-40 to 85		SSOP (DB) \| 16	View	2000	Not Available
SN74CB3Q3244DGVR	ACTIVE	-40 to 85	0.62 \| 1ku	TVSOP (DGV) \| 20		2000 \| LARGE T&R
SN74CB3Q3244DW	PREVIEW	-40 to 85		SOIC (DW) \| 16	View	40	Not Available
SN74CB3Q3244DWR	PREVIEW	-40 to 85		SOIC (DW) \| 16	View	2000	Not Available
SN74CB3Q3244GQNR	NRND	-40 to 85	1.25 \| 1ku	BGA MICROSTAR JUNIOR (GQN) \| 20		1000 \| LARGE T&R	Not Available
SN74CB3Q3244PW	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 20	View	70 \| TUBE	Purchase Samples
SN74CB3Q3244PWE4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 20	View	70 \| TUBE	Purchase Samples
SN74CB3Q3244PWG4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 20	View	70 \| TUBE	Purchase Samples
SN74CB3Q3244PWR	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 20	View	2000 \| LARGE T&R
SN74CB3Q3244PWRE4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 20	View	2000 \| LARGE T&R
SN74CB3Q3244PWRG4	ACTIVE	-40 to 85	0.62 \| 1ku	TSSOP (PW) \| 20	View	2000 \| LARGE T&R
SN74CB3Q3244RGYR	ACTIVE	-40 to 85	0.84 \| 1ku	QFN (RGY) \| 20		1000 \| LARGE T&R
SN74CB3Q3244ZQNR	ACTIVE	-40 to 85	0.84 \| 1ku	BGA MICROSTAR JUNIOR (ZQN) \| 20		1000 \| LARGE T&R

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 10:59 AM GMT, 08 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 15 Weeks74CB3Q3244DBQRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 Weeks74CB3Q3244DBQRG4
Worldwide	DigiKey	Available
TI Lead Time*: 8 Weeks74CB3Q3244DGVRE4
Worldwide	DigiKey	Available
TI Lead Time*: 8 Weeks74CB3Q3244DGVRG4
None Reported View Distributors
TI Lead Time*: 14 Weeks74CB3Q3244RGYRG4
None Reported View Distributors
TI Lead Time*: 15 WeeksSN74CB3Q3244DBQR
Worldwide	DigiKey	>1k
TI Lead Time*: 8 WeeksSN74CB3Q3244DGVR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	476
TI Lead Time*: 8 WeeksSN74CB3Q3244GQNR
Americas	Rochester Electronics	1k
TI Lead Time*: 20 WeeksSN74CB3Q3244PW
Americas	Rochester Electronics	>1k
Asia	Farnell Asia	280
Europe	Farnell	280
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74CB3Q3244PWE4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74CB3Q3244PWG4
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 19 WeeksSN74CB3Q3244PWR
Americas	Arrow	>1k
Americas	Avnet	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 19 WeeksSN74CB3Q3244PWRE4
Worldwide	DigiKey	Available
TI Lead Time*: 19 WeeksSN74CB3Q3244PWRG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksSN74CB3Q3244RGYR
Americas	Rochester Electronics	>1k
TI Lead Time*: 8 WeeksSN74CB3Q3244ZQNR
Americas	Avnet	1k
	Newark	1k
	Rochester Electronics	1k
Asia	Farnell Asia	1k
Worldwide	DigiKey	>1k
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
74CB3Q3244DBQRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
74CB3Q3244DBQRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
74CB3Q3244DGVRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
74CB3Q3244DGVRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
74CB3Q3244RGYRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CB3Q3244DBQR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CB3Q3244DBR					View
SN74CB3Q3244DGVR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3244DW					View
SN74CB3Q3244DWR					View
SN74CB3Q3244GQNR	TBD	SNPB	Level-1-240C-UNLIM	View	View
SN74CB3Q3244PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3244PWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3244PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3244PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3244PWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3244PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74CB3Q3244RGYR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
SN74CB3Q3244ZQNR	Green (RoHS & no Sb/Br)	SNAGCU	Level-1-260C-UNLIM	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for SN74CB3Q3244

Datasheet

SN74CB3Q3244 (Rev. B) (PDF, 1058 KB)
02 Dec 2004

Application Notes

Bus FET Switch Solutions for Live Insertion Applications (HTM, 8 KB) 1982 views
07 Feb 2003 Read Abstract
CBT-C, CB3T, and CB3Q Signal-Switch Families (HTM, 8 KB) 2112 views
04 Feb 2003 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 26969 views
24 May 2004 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21380 views
28 May 2003 Read Abstract

View Application Notes for Digital Bus Switches

User Guides

LOGIC Pocket Data Book (Rev. B) (PDF, 6001 KB) 46833 views
16 Jan 2007
Signal Switch Data Book (Rev. A) (PDF, 18396 KB) 9501 views
14 Nov 2003

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 88618 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15250 views
07 Oct 2003
Digital Bus Switch Selection Guide (Rev. A) (PDF, 719 KB) 2696 views
10 Nov 2004

Simulation Models

IBIS Model
- SN74CB3Q3244 IBIS Model (Multiple File Format) 164 views
  25 Nov 2003 Read Abstract

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SN74CB3Q3244 Status: ACTIVE

8-Bit FET Bus Switch 2.5-V/3.3-V Low-Voltage High-Bandwidth Bus Switch

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Datasheet

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